Short for Moustache.
Esp. a ridiculous wassisname from The Darkness/Paul Thompson from Franz Ferdinand
ehehehehehe! He's got a pimp mo!
by Pretty Vacant May 17, 2004
Im From the Mo. ya know?
by CnClear January 27, 2011
short for moron
Tell your boyfriend to stop being such a mo
by liljojo June 09, 2010
Morbidly Obese

If you are 100 lbs over your ideal body weight. Have a Body Mass Index (BMI) of over 40. Or in other words are "rather large!"
They really shouldn't have "all you can eat" places! Too much of a MO hangout.
by TheCraw2 September 21, 2009
An exclamation to express you amazement at something that is good.
Ice cream is ready.
Response: mo!

You just won a million dollars.
Response: mo!
by gerrypez July 14, 2009
Abbreviation for the word "more".
"Gimme mo pussy!"
by x January 31, 2003
MO - Multiple Orgasm.

To have many orgasms, one after the other in short succession.
I MO'd so hard that I soaked the sheets last night.
by Fairchildjune August 04, 2013

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